磨料射流冲击岩石损伤机制的数值分析

针对岩石透明条件差，磨料射流冲击岩石的损伤机制不易观察等问题，运用SPH和FEM耦合算法，并引入J-H-C含损伤本构模型描述磨料射流冲击下岩石的损伤场的演化机制。研究结果表明，磨料射流侵彻岩石的深度与磨料射流中磨料的浓度与磨料形状有关；岩石在磨料水射流作用下的沿径向和轴向损伤是呈阶梯式的，距离冲击表面越近，损伤曲线的梯度越大，损伤演化的阶梯形式越不明显；距离冲击表面越远，损伤曲线的梯度越小，损伤演化的阶梯形式越明显。

Numerical simulation of damage mechanism of abrasive water jet impaction on rock

Aiming at problems that rock is opaque and damage can not be observed easily, the method of coupling smoothed particle hydrodynamics (SPH) method with finite element method are used to investigate the mechanism and damage evolution of abrasive water jet impaction on rock which is based on J-H-C damage constitutive model. According to numerical results, the damage forms of abrasive water jet impaction on rock are staged along cross direction and long direction. The depths of abrasive water jet penetration are in relation to the shape and density of abrasive. The shape of damage caused by impaction in rock is staged. The distance from surface impacted by abrasive water jet is shorter, the damage gradient ascent violently and vice versa.